$$\int\:x^2\sqrt{x}dx$$

$$\frac{dx}{dt}=-\frac{x}{t-1}$$

$$5^6\cdot5^{-5}\cdot125\cdot2^4\cdot2^{-5}$$

$$\int\:\frac{u}{\sqrt{-u^2+4}}du$$

$$4x^2-12xy^2+9y^4$$

$$sec^2\theta\:+sec\theta\:\:tan\theta\:$$

$$5y^2+10x+30$$